ML20215G732

Marked-up Proposed Tech Specs,Relaxing Action Statements Applicable When RCS Leakage Detection Sys Inoperable

ML20215G732
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	06/17/1987
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20215G718	List: ML20215G716 ML20215G732
References
NUDOCS 8706230366
Download: ML20215G732 (4)

Text

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ATTACHMENT A

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1 PROPOSED CHANGE TO APPENDIX A, 1

TECHNICAL SPECIFICATIONS, FACILITY OPERATING LICENSES j NPF-37,'NPF-66 and NPF Revised Page: 3/4 4-20~

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, ' REACTOR COOLANT SYSTEM 3/4.4.6 REACTOR COOLANT SYSTEM LEAKAGE LEAKAGE DETECTION SYSTEMS LIMITING CONDITION FOR OPERATION 3.4.6.1 The following Reactor Coolant System Leakage Detection Systems shall be OPERABLE:

a. The Containment Atmosphere Particulate Radioactivity Monitoring System,

b. The Containment Floor Drain and Reactor Cavity Flow Monitoring System, and

c. The Containment Gaseous Radioactivity Monitoring System. l APPLICABILITY: MODES 1, 2, 3, and 4. -

ACTION: 4 i

a. With a. or c. of the above required Leakage Detection Systems inoperable, I operation may continue for up to 30 days provided grab samples of the I containment atmosphere are obtained and analyzed for gaseous and particulate radioactivity at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> when the required Gaseous or Particulate Radioactivity Monitoring System is inoperable; otherwise, be in j at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within I

the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. 6 restore. +o OPERABLE. Stufus edhin 30 day 5j cdherw

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b. Withb.oftheaboverequiredLeakageDetectionSystemsinoperable[beinat

, least HOT STANDBY within the next 6 h6urs and in COLD SHUTDOWN within the i following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. I two l

c. With a =and:c. of the above required Leakage Detection Systems inoperable:

two Leaxop petection s stems wi+h a. and c. 1) Restore 3eithard4crntorkgESysrem- i-e-cd to OPERABLE status within l M h obert 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />;and reguiced

,s m.rns 32} odbtain and analyze a grab sample of the containment atmosphere for Qnoperdit, gaseous and particulate radioactivity at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and 24 Perform a Reactor Coolant System water inventory balance at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />,and Otherwise, be in at least HOT STANOBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEILLANCE REOUIREMENTS 4.4.6.1 The Leakage Detection Systems shall be cemonstrated OPERABLE by:

a. Containment Atmosphere Gaseous and Particulate Monitoring System-performance of CHANNEL CHECK, CHANNEL CALIBRATION, and DIGITAL CHANNEL OPERATIONAL TEST at the frequencies specified in Table 4.3-3,

b. Containment Floor Drain and Reactor Cavity Flow Monitoring System-performance of CHANNEL CALIBRATION at least once per 18 months, and

c. Verify the oil separator portion of the containment floor drain collection sump has been filled to the level of the overflow to the containment floor drain unidentified leakage collection weir box once per 18 months, following refueling, and prior to initial startup.

BYRON - UNITS 1 & 2 3/4 4-20 Us

, ' REACTOR COOLANT SYSTEM i j 3/4.4.6 REACTOR COOLANT SYSTEM LEAKAGE 4 LEAKAGE OETECTION SYSTEMS 1

I LIMITING CONDITION FOR OPERATION 3.4.6.1 The following Reactor Coolant System Leakage Detection Systems shall be OPERABLE:

a. The Containment Atmosphere Particulate Radioactivity Monitoring System,

b. The Containment Floor Orain and Reactor Cavity Flow Monitoring System, and

c. The Contai'nment Gaseous Radioactivity Monitoring System. i APPLICABILITY: MODES 1, 2, 3, and 4. -

ACTION: q

a. With a. or c. of the above required Leakage Detection Systems inoperable, operation may continue for up to 30 days provided grab samples of the i containment atmosphere are obtained and analyzed for gaseous and particulate  !

radioactivity at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> when the required Gaseous or  ;

Particulate Radioactivity Monitoring System is inoperable; otherwise, be in )

at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLO SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. 6 restore. +o OPERABLE. stufos wdhin 30daysy otherw

b. Withb.oftheaboverequiredLeakageDetectionSystemsinoperable[beinat i 1 least HOT STANOBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLO SHUTOOWN within the j following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. -

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With a D ad=c. of the above t$uf red Leakahe Detection Systems inoperable:

two Leakaae. p tion s 3 erw .  ;

Wi+h o. and c. 1) Restore 3eitherrMonitoringESy- 2; m rni9 to OPERABLE status within i M 4ht above 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />;and reguired 5 mrns 3 O e6btain and analyze a grab sample of the containment atmosphere for Qnoper6k gaseous and particulate radioactivity at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and 24} Perform a Reactor Coolant System water inventory balance at least once '

per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />,and Otherwise, be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLO SHUT 00WN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEILLANCE REOUIREMENTS 4.4.6.1 The Leakage Detection Systems shall be demonstrated OPERABLE by:  ;

a. Containment Atmosphere Gaseous and Particulate Monitoring System-performance of CHANNEL CHECK, CHANNEL CALIBRATION, and DIGITAL CHANNEL ,

OPERATIONAL TEST at the frequencies specified in Table 4.3-3,

b. Containment Floor Drain and Reactor Cavity Flow Monitoring System-performance of CHANNEL CALIBRATION at least once per 18 months, and

c. Verify the oil separator portion of the containment floor drain collection sump has been filled to the level of the overflow to the containment floor drain unidentified leakage collection weir box once per 18 months, following refueling, and prior to initial _startup.

SYRON - UNITS 1 & 2 3/4 4-20 4

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, ATTACHMENT B EXPLANATION OF PROPOSED TECHNICAL SPECIFICATION CHANGE The three reactor coolant system leakage detection systems in Technical Specification 3.4.6.1 are provided to monitor and detect leakage from the reactor coolant pressure boundary. These systems are consistent h with the recommendations of NRC Regulatory Guide 1.45. The current Byron Technical Specification allows a unit to continue to operate for up to 30 days when either the containment atmosphere particulate or gaseous  :

radioactivity monitoring system is inoperable, provided grab samples are 1 taken every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. However, if the containment floor drain and reactor cavity flow monitoring system becomes inoperable, the unit must be shutdown. This requirement to shutdown a unit when two of the three redundant leakage detection systems are still operable is overly restrictive.

This proposed amendment would allow unit operation to continue for up to 30 days with two of three leakage detection systems operable. This is consistent with the Standard Technical Specifications for Westinghouse Pressurized Water Reactors (NUREG -0452 Rev. 4).

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< ATTACHMENT C EVALUATION OF SIGNIFICANT HAZARDS CONSIDERATIONS 1

Commonwealth Edison has evaluated this proposed amendment and determined that_it involves no significant hazards considerations.

According to 10CFR 50.92(c), a proposed amendment to an operating license ,

involves no significant hazards considerations if operation of the facility i in accordance with the amendment would not: l l

1) Involve a significant increase in the probability or consequences j of an accident previously evaluated; or J I

2) Create the possibility of a new or different kind of accident from )

any accident previously evaluated; or j

3) Involve a significant reduction in a margin of safety.

This proposed amendment would allow unit operation to continue for up to 30 days with any one of the three reactor coolant pressure boundary ,

leakage detection systems inoperable. Sufficient leakage detection 1 '

capability will still exist under the provisions of the proposed action statements to allow operators to detect and monitor any RCS pressure boundary leakage and take action to prevent further degradation of the RCS )

pressure boundary. As a result, the probability of previously evaluated )

accidents will not be significantly increased by a revision to the action  !

statement for inoperable leakage detection systems. j l

The consequences of previously evaluated accidents are not affected by the availability of the RCS leakage detection systems because the RCS 1 leakage detection systems do not function to mitigate the consequences of  !

previously evaluated accidents. Their purpose is only to monitor and detect I leakage from the RCS pressure boundary.

This proposed amendment only affects the availability of redundant RCS leakage detection systems. It does not allow any new modes of operation beyond those normally performed at operating PWR's. Additionally, this amendment does not allow any modifications to the plant. For these reasons, this proposed amendment does not create the possibility of a new or different kind of accident from any accident previously evaluated.

The leakage detection systems are designed to detect a one gpm leak in one hour. According to a Westinghouse leak-before-break study performed for Byron /Braidwood, the calculated leak rate through the postulated flaw results in a factor of at least 10 relative to the sensitivity of the leakage detection systems. This margin is not affected by the proposed amendment.

For the reasons stated above, Commonwealth Edison believes this proposed amendment involves no significant hazards considerations.

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